ugbunusylvia
ugbunusylvia ugbunusylvia
  • 25-12-2023
  • Mathematics
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Please answer this question​

Please answer this question class=

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welpkh
welpkh welpkh
  • 25-12-2023

Answer:

just for (a.) 126cm²

Step-by-step explanation:

The idea is that;

[Total area which is area of rectangle] - [Total area of circle since the semicircles make a circle] = Shaded region

π= 3/1/7

Area of rectangle= 20 × 14 = 280

Area of circle= the diameter of the circle is 14, diameter=2radius

thus, r=7

Area of circle= πr²

(3/1/7)×7² = 154

hence, 280-154= 126cm²

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